diff options
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/dm-mpath.c | 8 | ||||
| -rw-r--r-- | drivers/md/dm-raid1.c | 4 | ||||
| -rw-r--r-- | drivers/md/dm-snap.c | 32 | ||||
| -rw-r--r-- | drivers/md/dm-snap.h | 2 | ||||
| -rw-r--r-- | drivers/md/dm-stripe.c | 4 | ||||
| -rw-r--r-- | drivers/md/dm.c | 34 | ||||
| -rw-r--r-- | drivers/md/linear.c | 2 | ||||
| -rw-r--r-- | drivers/md/md.c | 57 | ||||
| -rw-r--r-- | drivers/md/raid10.c | 2 |
9 files changed, 96 insertions, 49 deletions
diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c index 4840733cd903..3d7f4923cd13 100644 --- a/drivers/md/dm-mpath.c +++ b/drivers/md/dm-mpath.c @@ -441,13 +441,13 @@ static void process_queued_ios(struct work_struct *work) __choose_pgpath(m); pgpath = m->current_pgpath; - m->pgpath_to_activate = m->current_pgpath; if ((pgpath && !m->queue_io) || (!pgpath && !m->queue_if_no_path)) must_queue = 0; - if (m->pg_init_required && !m->pg_init_in_progress) { + if (m->pg_init_required && !m->pg_init_in_progress && pgpath) { + m->pgpath_to_activate = pgpath; m->pg_init_count++; m->pg_init_required = 0; m->pg_init_in_progress = 1; @@ -708,6 +708,10 @@ static int parse_hw_handler(struct arg_set *as, struct multipath *m) m->hw_handler_name = NULL; return -EINVAL; } + + if (hw_argc > 1) + DMWARN("Ignoring user-specified arguments for " + "hardware handler \"%s\"", m->hw_handler_name); consume(as, hw_argc - 1); return 0; diff --git a/drivers/md/dm-raid1.c b/drivers/md/dm-raid1.c index 92dcc06832a4..ec43f9fa4b2a 100644 --- a/drivers/md/dm-raid1.c +++ b/drivers/md/dm-raid1.c @@ -656,9 +656,10 @@ static void do_failures(struct mirror_set *ms, struct bio_list *failures) return; if (!ms->log_failure) { - while ((bio = bio_list_pop(failures))) + while ((bio = bio_list_pop(failures))) { ms->in_sync = 0; dm_rh_mark_nosync(ms->rh, bio, bio->bi_size, 0); + } return; } @@ -1031,6 +1032,7 @@ static void mirror_dtr(struct dm_target *ti) del_timer_sync(&ms->timer); flush_workqueue(ms->kmirrord_wq); + flush_scheduled_work(); dm_kcopyd_client_destroy(ms->kcopyd_client); destroy_workqueue(ms->kmirrord_wq); free_context(ms, ti, ms->nr_mirrors); diff --git a/drivers/md/dm-snap.c b/drivers/md/dm-snap.c index b2d9d1ac28ad..6c96db26b87c 100644 --- a/drivers/md/dm-snap.c +++ b/drivers/md/dm-snap.c @@ -229,19 +229,21 @@ static void __insert_origin(struct origin *o) */ static int register_snapshot(struct dm_snapshot *snap) { - struct origin *o; + struct origin *o, *new_o; struct block_device *bdev = snap->origin->bdev; + new_o = kmalloc(sizeof(*new_o), GFP_KERNEL); + if (!new_o) + return -ENOMEM; + down_write(&_origins_lock); o = __lookup_origin(bdev); - if (!o) { + if (o) + kfree(new_o); + else { /* New origin */ - o = kmalloc(sizeof(*o), GFP_KERNEL); - if (!o) { - up_write(&_origins_lock); - return -ENOMEM; - } + o = new_o; /* Initialise the struct */ INIT_LIST_HEAD(&o->snapshots); @@ -368,6 +370,7 @@ static struct dm_snap_pending_exception *alloc_pending_exception(struct dm_snaps struct dm_snap_pending_exception *pe = mempool_alloc(s->pending_pool, GFP_NOIO); + atomic_inc(&s->pending_exceptions_count); pe->snap = s; return pe; @@ -375,7 +378,11 @@ static struct dm_snap_pending_exception *alloc_pending_exception(struct dm_snaps static void free_pending_exception(struct dm_snap_pending_exception *pe) { - mempool_free(pe, pe->snap->pending_pool); + struct dm_snapshot *s = pe->snap; + + mempool_free(pe, s->pending_pool); + smp_mb__before_atomic_dec(); + atomic_dec(&s->pending_exceptions_count); } static void insert_completed_exception(struct dm_snapshot *s, @@ -600,6 +607,7 @@ static int snapshot_ctr(struct dm_target *ti, unsigned int argc, char **argv) s->valid = 1; s->active = 0; + atomic_set(&s->pending_exceptions_count, 0); init_rwsem(&s->lock); spin_lock_init(&s->pe_lock); s->ti = ti; @@ -726,6 +734,14 @@ static void snapshot_dtr(struct dm_target *ti) /* After this returns there can be no new kcopyd jobs. */ unregister_snapshot(s); + while (atomic_read(&s->pending_exceptions_count)) + yield(); + /* + * Ensure instructions in mempool_destroy aren't reordered + * before atomic_read. + */ + smp_mb(); + #ifdef CONFIG_DM_DEBUG for (i = 0; i < DM_TRACKED_CHUNK_HASH_SIZE; i++) BUG_ON(!hlist_empty(&s->tracked_chunk_hash[i])); diff --git a/drivers/md/dm-snap.h b/drivers/md/dm-snap.h index f07315fe2362..99c0106ede2d 100644 --- a/drivers/md/dm-snap.h +++ b/drivers/md/dm-snap.h @@ -160,6 +160,8 @@ struct dm_snapshot { mempool_t *pending_pool; + atomic_t pending_exceptions_count; + struct exception_table pending; struct exception_table complete; diff --git a/drivers/md/dm-stripe.c b/drivers/md/dm-stripe.c index a2d068dbe9e2..9e4ef88d421e 100644 --- a/drivers/md/dm-stripe.c +++ b/drivers/md/dm-stripe.c @@ -320,8 +320,10 @@ int __init dm_stripe_init(void) int r; r = dm_register_target(&stripe_target); - if (r < 0) + if (r < 0) { DMWARN("target registration failed"); + return r; + } kstriped = create_singlethread_workqueue("kstriped"); if (!kstriped) { diff --git a/drivers/md/dm.c b/drivers/md/dm.c index 6963ad148408..c99e4728ff41 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -375,7 +375,7 @@ static void start_io_acct(struct dm_io *io) dm_disk(md)->part0.in_flight = atomic_inc_return(&md->pending); } -static int end_io_acct(struct dm_io *io) +static void end_io_acct(struct dm_io *io) { struct mapped_device *md = io->md; struct bio *bio = io->bio; @@ -391,7 +391,9 @@ static int end_io_acct(struct dm_io *io) dm_disk(md)->part0.in_flight = pending = atomic_dec_return(&md->pending); - return !pending; + /* nudge anyone waiting on suspend queue */ + if (!pending) + wake_up(&md->wait); } /* @@ -499,9 +501,7 @@ static void dec_pending(struct dm_io *io, int error) spin_unlock_irqrestore(&io->md->pushback_lock, flags); } - if (end_io_acct(io)) - /* nudge anyone waiting on suspend queue */ - wake_up(&io->md->wait); + end_io_acct(io); if (io->error != DM_ENDIO_REQUEUE) { blk_add_trace_bio(io->md->queue, io->bio, @@ -937,16 +937,24 @@ static void dm_unplug_all(struct request_queue *q) static int dm_any_congested(void *congested_data, int bdi_bits) { - int r; - struct mapped_device *md = (struct mapped_device *) congested_data; - struct dm_table *map = dm_get_table(md); + int r = bdi_bits; + struct mapped_device *md = congested_data; + struct dm_table *map; - if (!map || test_bit(DMF_BLOCK_IO, &md->flags)) - r = bdi_bits; - else - r = dm_table_any_congested(map, bdi_bits); + atomic_inc(&md->pending); + + if (!test_bit(DMF_BLOCK_IO, &md->flags)) { + map = dm_get_table(md); + if (map) { + r = dm_table_any_congested(map, bdi_bits); + dm_table_put(map); + } + } + + if (!atomic_dec_return(&md->pending)) + /* nudge anyone waiting on suspend queue */ + wake_up(&md->wait); - dm_table_put(map); return r; } diff --git a/drivers/md/linear.c b/drivers/md/linear.c index 190147c79e79..3b90c5c924ec 100644 --- a/drivers/md/linear.c +++ b/drivers/md/linear.c @@ -148,6 +148,8 @@ static linear_conf_t *linear_conf(mddev_t *mddev, int raid_disks) min_sectors = conf->array_sectors; sector_div(min_sectors, PAGE_SIZE/sizeof(struct dev_info *)); + if (min_sectors == 0) + min_sectors = 1; /* min_sectors is the minimum spacing that will fit the hash * table in one PAGE. This may be much smaller than needed. diff --git a/drivers/md/md.c b/drivers/md/md.c index c1a837ca193c..1b1d32694f6f 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -222,6 +222,9 @@ static void mddev_put(mddev_t *mddev) list_del(&mddev->all_mddevs); spin_unlock(&all_mddevs_lock); blk_cleanup_queue(mddev->queue); + if (mddev->sysfs_state) + sysfs_put(mddev->sysfs_state); + mddev->sysfs_state = NULL; kobject_put(&mddev->kobj); } else spin_unlock(&all_mddevs_lock); @@ -1459,6 +1462,8 @@ static int bind_rdev_to_array(mdk_rdev_t * rdev, mddev_t * mddev) kobject_del(&rdev->kobj); goto fail; } + rdev->sysfs_state = sysfs_get_dirent(rdev->kobj.sd, "state"); + list_add_rcu(&rdev->same_set, &mddev->disks); bd_claim_by_disk(rdev->bdev, rdev->bdev->bd_holder, mddev->gendisk); return 0; @@ -1488,7 +1493,8 @@ static void unbind_rdev_from_array(mdk_rdev_t * rdev) printk(KERN_INFO "md: unbind<%s>\n", bdevname(rdev->bdev,b)); rdev->mddev = NULL; sysfs_remove_link(&rdev->kobj, "block"); - + sysfs_put(rdev->sysfs_state); + rdev->sysfs_state = NULL; /* We need to delay this, otherwise we can deadlock when * writing to 'remove' to "dev/state". We also need * to delay it due to rcu usage. @@ -1923,8 +1929,8 @@ state_store(mdk_rdev_t *rdev, const char *buf, size_t len) err = 0; } - if (!err) - sysfs_notify(&rdev->kobj, NULL, "state"); + if (!err && rdev->sysfs_state) + sysfs_notify_dirent(rdev->sysfs_state); return err ? err : len; } static struct rdev_sysfs_entry rdev_state = @@ -2019,7 +2025,7 @@ slot_store(mdk_rdev_t *rdev, const char *buf, size_t len) rdev->raid_disk = -1; return err; } else - sysfs_notify(&rdev->kobj, NULL, "state"); + sysfs_notify_dirent(rdev->sysfs_state); sprintf(nm, "rd%d", rdev->raid_disk); if (sysfs_create_link(&rdev->mddev->kobj, &rdev->kobj, nm)) printk(KERN_WARNING @@ -2036,7 +2042,7 @@ slot_store(mdk_rdev_t *rdev, const char *buf, size_t len) clear_bit(Faulty, &rdev->flags); clear_bit(WriteMostly, &rdev->flags); set_bit(In_sync, &rdev->flags); - sysfs_notify(&rdev->kobj, NULL, "state"); + sysfs_notify_dirent(rdev->sysfs_state); } return len; } @@ -2770,7 +2776,7 @@ array_state_store(mddev_t *mddev, const char *buf, size_t len) if (err) return err; else { - sysfs_notify(&mddev->kobj, NULL, "array_state"); + sysfs_notify_dirent(mddev->sysfs_state); return len; } } @@ -3457,6 +3463,11 @@ static struct kobject *md_probe(dev_t dev, int *part, void *data) disk->fops = &md_fops; disk->private_data = mddev; disk->queue = mddev->queue; + /* Allow extended partitions. This makes the + * 'mdp' device redundant, but we can really + * remove it now. + */ + disk->flags |= GENHD_FL_EXT_DEVT; add_disk(disk); mddev->gendisk = disk; error = kobject_init_and_add(&mddev->kobj, &md_ktype, @@ -3465,8 +3476,10 @@ static struct kobject *md_probe(dev_t dev, int *part, void *data) if (error) printk(KERN_WARNING "md: cannot register %s/md - name in use\n", disk->disk_name); - else + else { kobject_uevent(&mddev->kobj, KOBJ_ADD); + mddev->sysfs_state = sysfs_get_dirent(mddev->kobj.sd, "array_state"); + } return NULL; } @@ -3477,7 +3490,7 @@ static void md_safemode_timeout(unsigned long data) if (!atomic_read(&mddev->writes_pending)) { mddev->safemode = 1; if (mddev->external) - set_bit(MD_NOTIFY_ARRAY_STATE, &mddev->flags); + sysfs_notify_dirent(mddev->sysfs_state); } md_wakeup_thread(mddev->thread); } @@ -3578,7 +3591,7 @@ static int do_md_run(mddev_t * mddev) return -EINVAL; } } - sysfs_notify(&rdev->kobj, NULL, "state"); + sysfs_notify_dirent(rdev->sysfs_state); } md_probe(mddev->unit, NULL, NULL); @@ -3740,7 +3753,7 @@ static int do_md_run(mddev_t * mddev) mddev->changed = 1; md_new_event(mddev); - sysfs_notify(&mddev->kobj, NULL, "array_state"); + sysfs_notify_dirent(mddev->sysfs_state); sysfs_notify(&mddev->kobj, NULL, "sync_action"); sysfs_notify(&mddev->kobj, NULL, "degraded"); kobject_uevent(&disk_to_dev(mddev->gendisk)->kobj, KOBJ_CHANGE); @@ -3767,7 +3780,7 @@ static int restart_array(mddev_t *mddev) set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); md_wakeup_thread(mddev->thread); md_wakeup_thread(mddev->sync_thread); - sysfs_notify(&mddev->kobj, NULL, "array_state"); + sysfs_notify_dirent(mddev->sysfs_state); return 0; } @@ -3847,7 +3860,7 @@ static int do_md_stop(mddev_t * mddev, int mode, int is_open) module_put(mddev->pers->owner); mddev->pers = NULL; /* tell userspace to handle 'inactive' */ - sysfs_notify(&mddev->kobj, NULL, "array_state"); + sysfs_notify_dirent(mddev->sysfs_state); set_capacity(disk, 0); mddev->changed = 1; @@ -3927,13 +3940,14 @@ static int do_md_stop(mddev_t * mddev, int mode, int is_open) mddev->degraded = 0; mddev->barriers_work = 0; mddev->safemode = 0; + kobject_uevent(&disk_to_dev(mddev->gendisk)->kobj, KOBJ_CHANGE); } else if (mddev->pers) printk(KERN_INFO "md: %s switched to read-only mode.\n", mdname(mddev)); err = 0; md_new_event(mddev); - sysfs_notify(&mddev->kobj, NULL, "array_state"); + sysfs_notify_dirent(mddev->sysfs_state); out: return err; } @@ -4297,7 +4311,7 @@ static int add_new_disk(mddev_t * mddev, mdu_disk_info_t *info) if (err) export_rdev(rdev); else - sysfs_notify(&rdev->kobj, NULL, "state"); + sysfs_notify_dirent(rdev->sysfs_state); md_update_sb(mddev, 1); if (mddev->degraded) @@ -4938,7 +4952,7 @@ static int md_ioctl(struct block_device *bdev, fmode_t mode, if (_IOC_TYPE(cmd) == MD_MAJOR && mddev->ro && mddev->pers) { if (mddev->ro == 2) { mddev->ro = 0; - sysfs_notify(&mddev->kobj, NULL, "array_state"); + sysfs_notify_dirent(mddev->sysfs_state); set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); md_wakeup_thread(mddev->thread); } else { @@ -5612,7 +5626,7 @@ void md_write_start(mddev_t *mddev, struct bio *bi) spin_unlock_irq(&mddev->write_lock); } if (did_change) - sysfs_notify(&mddev->kobj, NULL, "array_state"); + sysfs_notify_dirent(mddev->sysfs_state); wait_event(mddev->sb_wait, !test_bit(MD_CHANGE_CLEAN, &mddev->flags) && !test_bit(MD_CHANGE_PENDING, &mddev->flags)); @@ -5655,7 +5669,7 @@ int md_allow_write(mddev_t *mddev) mddev->safemode = 1; spin_unlock_irq(&mddev->write_lock); md_update_sb(mddev, 0); - sysfs_notify(&mddev->kobj, NULL, "array_state"); + sysfs_notify_dirent(mddev->sysfs_state); } else spin_unlock_irq(&mddev->write_lock); @@ -6048,9 +6062,6 @@ void md_check_recovery(mddev_t *mddev) if (mddev->bitmap) bitmap_daemon_work(mddev->bitmap); - if (test_and_clear_bit(MD_NOTIFY_ARRAY_STATE, &mddev->flags)) - sysfs_notify(&mddev->kobj, NULL, "array_state"); - if (mddev->ro) return; @@ -6103,7 +6114,7 @@ void md_check_recovery(mddev_t *mddev) mddev->safemode = 0; spin_unlock_irq(&mddev->write_lock); if (did_change) - sysfs_notify(&mddev->kobj, NULL, "array_state"); + sysfs_notify_dirent(mddev->sysfs_state); } if (mddev->flags) @@ -6111,7 +6122,7 @@ void md_check_recovery(mddev_t *mddev) rdev_for_each(rdev, rtmp, mddev) if (test_and_clear_bit(StateChanged, &rdev->flags)) - sysfs_notify(&rdev->kobj, NULL, "state"); + sysfs_notify_dirent(rdev->sysfs_state); if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) && @@ -6221,7 +6232,7 @@ void md_check_recovery(mddev_t *mddev) void md_wait_for_blocked_rdev(mdk_rdev_t *rdev, mddev_t *mddev) { - sysfs_notify(&rdev->kobj, NULL, "state"); + sysfs_notify_dirent(rdev->sysfs_state); wait_event_timeout(rdev->blocked_wait, !test_bit(Blocked, &rdev->flags), msecs_to_jiffies(5000)); diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c index da5129a24b18..970a96ef9b18 100644 --- a/drivers/md/raid10.c +++ b/drivers/md/raid10.c @@ -1137,7 +1137,7 @@ static int raid10_add_disk(mddev_t *mddev, mdk_rdev_t *rdev) if (!enough(conf)) return -EINVAL; - if (rdev->raid_disk) + if (rdev->raid_disk >= 0) first = last = rdev->raid_disk; if (rdev->saved_raid_disk >= 0 && |
